Atomic-volume deviations and occurrence of atomic magnetic moments in transition metals and their alloys

The neutral six-coordinated tetragonal Co(β-ala)2•2H2O complex(β-ala = NH2CH2CH2COO−) was prepared. In this complex β-alanine acts as an O,N-chelating agent, as in the known Cu(β-ala)2•6H2O and Ni(β-ala)2•3H2O complexes. We also prepared some complexes of a type that is new for β-alanine, with stoichiometries such as M(β-alaH)2X2, M(β-alaH)4(ClO4)2 (M = Co and Ni), Cu(β-alaH)3(ClO4)2, and Cu(β-alaH)Cl2[Formula: see text] in which the ligand acts as a zwitterion and coordinates toward the carboxy group as a formally neutral ligand. The possibility of formulating the complexes as H2[M(β-ala)2X2] is discussed. The electronic spectra and the magnetic moments of the halide complexes are in accord with pseudo-tetrahedral, octahedral, and tetragonal stereochemistry for the cobalt(II), nickel(II), and copper(II) ions, respectively, while those of the perchlorate complexes are in accord with pseudooctahedral stereochemistry. The β-alanine hydrohalide salts and the bis(β-alaninium)tetrachlorocuprate complex were also prepared and are discussed.

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Localized magnetic moments in transition metals and alloys

Journal of Physics and Chemistry of Solids ◽

10.1016/s0022-3697(72)80464-5 ◽

1972 ◽

Vol 33 (7-9) ◽

pp. 1685-1696 ◽

Cited By ~ 3

Author(s):

D.H. Faulkner ◽

J.W. Schweitzer

Keyword(s):

Transition Metals ◽

Magnetic Moments ◽

Metals And Alloys

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Hierarchy of percolation thresholds and the mechanism for reduction of magnetic moments of transition metals intercalated into TiSe2

Physics of the Solid State ◽

10.1134/1.1799187 ◽

2004 ◽

Vol 46 (9) ◽

pp. 1681-1685 ◽

Cited By ~ 12

Author(s):

A. N. Titov ◽

Yu. M. Yarmoshenko ◽

M. Neumann ◽

V. G. Pleshchev ◽

S. G. Titova

Keyword(s):

Transition Metals ◽

Magnetic Moments ◽

Percolation Thresholds

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Hyperfine fields and local magnetic moments of metallic glasses of 3d-transition metals

Journal of Magnetism and Magnetic Materials ◽

10.1016/0304-8853(80)90323-6 ◽

1980 ◽

Vol 15-18 ◽

pp. 1364-1366 ◽

Cited By ~ 21

Author(s):

H. Franke ◽

S. Dey ◽

M. Rosenberg ◽

F.E. Luborsky ◽

J.L. Walter

Keyword(s):

Transition Metals ◽

Metallic Glasses ◽

Magnetic Moments ◽

Hyperfine Fields

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Appearance of Magnetic Moments in 3d Transition Metals in bcc and fcc lattices.

Journal of the Magnetics Society of Japan ◽

10.3379/jmsjmag.23.1145 ◽

1999 ◽

Vol 23 (4−2) ◽

pp. 1145-1148

Author(s):

M. Tokii ◽

S. Wakoh ◽

T. Mizoguchi

Keyword(s):

Transition Metals ◽

Magnetic Moments

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FORMATION OF MAGNETIC MOMENTS IN INTERMETALLIC COMPOUNDS AND ALLOYS

International Journal of Modern Physics B ◽

10.1142/s0217979293001591 ◽

1993 ◽

Vol 07 (01n03) ◽

pp. 756-759 ◽

Cited By ~ 4

Author(s):

T. BEUERLE ◽

K. HUMMLER ◽

M. FÄHNLE

Keyword(s):

Transition Metals ◽

Ab Initio ◽

Intermetallic Compounds ◽

Magnetic Moment ◽

Nearest Neighbor ◽

Physical Mechanism ◽

Magnetic Moments ◽

Lmto Method ◽

Minimum Number ◽

Alloy Systems

Jaccarino and Walker proposed that in certain alloy systems a considered kind of atom attains a constant value of the magnetic moment if it is surrounded by at least a minimum number of nearest-neighbor atoms of a certain kind, and that it is nonmagnetic otherwise. It is shown by ab initio supercell calculations within the LMTO method that the system Nbi−xMox with 1% iron approximately fulfills the Jaccarino-Walker hypothesis, whereas the alloy FexRh1−x does not. The physical mechanism for the destruction of the Fe moment in bcc alloys with 4d and 5d transition metals is elucidated.

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